---
id: CVE-2026-98587
title: >-
  kernel: firewire: cdev: fix back-transition for iso_resource_auto client
  resource (CVE-2026-98587)
summary: >-
  A flaw was found in the Linux kernel's FireWire subsystem. A local user can
  trigger a race condition by concurrently releasing a device file descriptor
  while an asynchronous resource management task is running. This flaw allows a
  resource …
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-366
vendor: Red Hat
product: Red Hat Enterprise Linux 6
affected:
  - enterprise_linux 6
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T04:17:38+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98587.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98587.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98587'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554981'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98587'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98587'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98587.mbox
  - url: 'https://git.kernel.org/stable/c/ee1df60a0d0e8ab4b00137135733bdadd6d33dab'
  - url: 'https://git.kernel.org/stable/c/c6b51091cafff9ce6c03c1416aa13864d17ab97c'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00189
epssPercentile: 0.08507
ingestedAt: '2026-10-18T15:45:12.251Z'
---

## Overview

A flaw was found in the Linux kernel's FireWire subsystem. A local user can trigger a race condition by concurrently releasing a device file descriptor while an asynchronous resource management task is running. This flaw allows a resource state to transition backwards from deallocation to reallocation, leading to inconsistent internal states and a potential Denial of Service (DoS) through a system crash.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98587.json)

**kernel: firewire: cdev: fix back-transition for iso_resource_auto client resource** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.

Affected:

- Red Hat Enterprise Linux 6

No fix planned:

- Red Hat Enterprise Linux 6

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope